In the script for the home/ref all button in the pokeys.set screen, there are three lines at the end, DoOEMButton(133), (134), (135). What do these do? Supposedly Zero Encoders, but what does that mean? Like MPG encoders, or what? Sorry for the ignorance!!

It is the buttons to zero the encoder DROs, only if you have encoders back to Mach will these DROs have anything in them.
Hood